APPLE INSE(rrs — BUDS AND FOIJAGE 59 



summer the caterpillars are frequently found in webs spun across 

 the surfaces of the leaves by the spiders, Didyna foliacea and 

 Araneus displicatiis. There is also a great mortality, sometimes 

 nearly 50 per cent, among the larvae and pupae in the cocoons 

 in autumn, due apparently to some disease, causing them to 

 shrivel and become dry and hard. 



Remedial measures. 



Sprays of whale-oil soap (1 pound in 1 gallon of water), the 

 lime-sulfur wash, and probably the miscible oils (1 gallon in 

 10 of water) applied thoroughly at any time during the winter or 

 early spring, while the tree is dormant, will soak through the 

 white cocoons and kill the hibernating pupae. Judicious prun- 

 ing and burning of infested twigs in winter would destroy 

 many. The application of a poison spray in the latter part of 

 June will kill many of the tiny caterpillars then feeding on the 



leaves. 



Reference 



Cornell A^^r. Exp. Sta. Bull. 214. 1903. 



The Lei^seu Apple Leaf-uolleu 



Alceris minuta Robinson 



Throughout tlu^ eastern United States a small, pale yellowish- 

 green caterpillar, about J of an inch long, with a yellow head and 

 thoracic shield, often draws the opposite edges of apple leaves 

 together upwards and fastens them with silk. Living within 

 the shelter of this folded leaf it feeds over the inner surface, 

 often partially skeletonizing the leaf and causing it to turn 

 brown. Sometimes nursery stock and young orchards are so 

 badly infested, a majority of the leaves being folded and brown, 

 that from a distance the trees appear as if a fin) had swept 

 through them, and much injury results. Older bearing trees 

 are rarely seriously damaged by the insect. Besides being a 

 serious menace to young apple trees, and sometimes attacking 



